Proportioning apparatus



Feb. 20, 1940.

J. CORYDON AL 2,190,933

PROPORTIONING APPARATUS Original Filed June 7, 1935 fizz/anions Jeff Corcydon Patented Feb. 20, 1940 PATENT OFFICE PROPORTIONINGAPPARATUS Jeff Corydon and Rudy Lowe, Providence, R. L, assignors to Proportioners, Inc., Providence,

R. I., a corporation of Rhode Island -riginal application June' 7, 1935, Serial No. I

25,467. 1938, Serial No. 224,125

3 Claims.

Our, invention relates generally to proportioning apparatus and more particularly to suchapparatus adapted for use in proportionally treating a variable flow of a major liquid.

An important object of the present invention is to provide a new and improved proportioning apparatus for such use.

A further object is to provide a new and improved proportioning apparatus in which a finely graduated proportional relation may be attained between the major liquid and the minor liquid or reagent, and wherein corrective measures may be readily, easily and accurately applied to restore or initially attain the desired proportional relation, between the liquids.

Other objects and advantages will become apparent from the following description, taken in 1 connection with the accompanying drawing, in which w Figure 1 is a side elevational view, partially in section, showing a proportioning system embodying the features of our invention.

Figure 2 is a sectional view of a portion of the apparatus of Figure 1, the view being taken along the line 22 of Figure 1.

For purposes of disclosure, we have illustrated in the drawing and will hereinafter describe in detail the preferred embodiment of the invention, with the understanding that we do not intend to limit our invention to the particular construction and arrangement shown, it being contemplated that various changes may be made by those skilled in the art without departing from the spirit and scope of the appended claims.

In the form chosen for disclosure herein the, invention is embodied in a. proportioning apparatus adapted for use in proportionally injecting a reagent into a variable flow of liquid in a main conduit, said apparatus comprising a meter ||l having inlet and outlet connector pipes II and I2 adapted to beplaced between pipe sections l3 and I3" of a main conduit"'|3.

A mounting bracket H on the meter HI serves to support a gear box I5 which in turn supports a mounting yoke l8 projecting in opposite directions from the gear box. The mounting yoke It carries an injection pump l! at one end and an actuator l8 for the pump l1 at the other end. Both the actuator I! and the puinp are preierably reciprocatory in character, and as herein shown, each is in the form of a flexible diaphragm device. Thus as shown in Figure 2, the actuator It has a separable housing l9 between the two sections of which the peripheral edge of a-diaphragm is clamped. Centrally of Divided and this application August 10,

the diaphragm 20 one end of a piston or connecting rod 2| is secured, the rod 2| extending slidably from the housing l9 through a bearing gland 22.

A control valve device 23 is mounted on the actuator housing l9, and as the slidable valve member 24 is reclprocated, pressure fluid is supplied first to' one side of the diaphragm and then to the other through passages 25 from the valve housing. Pressure fluid is supplied from the 1 main conduit through a suitable connection such as that indicated diagrammatically at 26 in Figure 1.

The valve member 24 is reciprocated .by, and in proportional relation to, the operation. of the 15 meter 10 through suitable gearing, preferably replaceably housed withinthe gear box l5 and operatively connected to the valve rod 24'.

The injection pump I! has a flexible rubber treated diaphragm 3|), the peripheral edge of go which is clamped between a mounting'member 3| and a body member 32, these members bein secured together by clamp plates 33 and bolts 34. The mounting member 3| is so mounted on the yoke, l6 that the diaphragm is normally 5 perpendicular to the connecting rod,2|, and the central portion of the diaphragm 3,0 is connected to the end of the rod 2| by clamp plates 35, one of the plates 35 being secured as by riveting to the rod 2|.

When the diaphragm 30 is flexed by actuation of the rod 2|, it moves into or out of a pump chamber 36 formed in the adjacent face of the body member 32.

Intake and exhaust check valves 31 and 38 35 w are mounted on the ,upper and lower ends of the body member 32- and communicate with the pump chamber 36 through similar passages 39 formed in the body member 32. The intake 'valve 31 is connected to a reagent source by a 40 suitable conduit indicated at 40, while the discharge check valve 38 is connected by a pipe or hose to the conduit section H or pipe ll.

Forv any particular ratio ofgearing in the gear box IS, the pump I1 is stroked-at a rate which bears a definite'and fixed proportion to the rate of flow in'the conduit I3. The variation in reagent dosage or proportion is, therefore, attained in most cases through adjustment of the pump stroke; and in accordance with the present invention such adjustment is effected by an adjustable micrometer stop mechanism 45 acting to limit the suction stroke of the pump ll. In the form shown, the adjustable stop mechanism .45 comprises a sleeve 46 surrounding the connecting rod 2i adjacent to the pump H and threaded into the mounting member 3!. In this position an inturned flange 47 at its outer end (right hand, in Figure 1) lies in the path of a collar 48 fixed on the actuating rod 2! within the sleeve 46. The embodiment herein shown provides for a maximum pump stroke of onehalf inch, the pump of this size and construction being accurate throughout such a range, and a scale 50 fixed on the yoke"l6 has a five one-tenth inch scale divisions 5i marked thereon. An annular line 52 on the sleeve 46 indicates, by its relation to the divisions iii, the

adjustment of the sleeve 46. To attain furtherv accuracy, the screw threads of the sleeve 46 have a one-tenthinch lead, so that one full rotation of the sleeve 46 changes the pump stroke exactly one-tenth of an inch. By providing ten equal graduationsis along the annular line 52, a micrometer adjustment is provided for the stroke to an accuracy of one-hundredth of an inch. A lock nut 54 threaded on the outer surface of the sleeve 4'5 may be tightened against the mounting member 35 to maintain the required adjustment.

the sleeve. Thus over-stroking of the diaphragm 30 is prevented, and it should be noted that by such 1imitation,-accuracy of feeding is insured and undue strain and wear on the diaphragm is .avoided.

I This application is a division of our copending application Serial No. 25,467, filed June '1, 1935, patented January 31, 1939, #2,145,566.

We claim as our invention:

l. A proportioning device having in combination, a reciprocatory pump, means for reciprocating said rump arranged to move said pump through its suction stroke with a yieldingly applied force, adjustable stop means acting to limit and vary the suction stroke of the pump, a screw threaded member for adjusting said stop means, said member having threads of onetenth inch pitch, and said member having ten equal divisions about its circumference, and

means providing an indicator showing the position of the stop means to an accuracy of onetenth \inch, and means cooperating with said divisions to show the position of the stop means to an accuracy of one-hundredth of an inch.

2. In a device of the character described, the combination of a reciprocable diaphragm pump, actuating means operable to reciprocate said diaphragm, the suction stroke actuation thereof being by a yieldingly applied force, adjustable stop means for variably limiting such suction stroke movement, a screw threaded member operable in each lull rotation to move said stop means through one-tenth of an inch, a scale parallel to said member marked with one-tenth inch graduations, an annular indicating line on said member cooperating with said scale to indicate the position of adjustment, an annularly arranged series of ten equally spaced division marks on said member, and a stationary indicating element cooperating with said division marks to provide a micrometer indication of the position of said stop means.

'3. In a device of the character described, the

combination of a reciprocable diaphragm pump,

actuating means operable to reciprocate said diaphragm, the suction stroke actuation thereoi' being by a yieldingly applied force, adjustable stop means for variably limiting such suction stroke movement, a s crew threaded member operable in each full rotation to move said stop means through one-tenth of an inch, a scale parallel to said member marked with one-tenth inch graduations, an annular indicating line on said member cooperating with said scale to indicate the position of adjustment, an annularly arranged series of ten equally spaced division marks on said member, and a stationary indicating element cooperating with said division marks to provide a micrometer indication of 'theposition of said stop means, said stationary indicating' element having a part operable to determine the maximum movement of said diaphragm.

, JEFF CORYDOR,

RUDY LOWE. 

